Amber Tamblyn Detective Casey Shraeger Actor Jeremy Renner Detective Jason Walsh Actor Harold Perrineau Detective Leo Banks Actor Joshua Close Detective Henry Cole Actor Monique Curnen Detective Allison Beaumont Actor Kai Lennox Detective Eddie Alvarez Actor Terry Kinney Sgt. Harvey Brown Actor Adam Goldberg Detective Eric Delahoy Actor Kat Foster Nicole Brandt Guest Star Susan Park Dr. Monica Crumb Guest Star Matt Servitto Dr. Andre Zamacona Guest Star Betty Gilpin Abigail Allen , Margo Stanford Guest Star Geneva Carr Cheryl Thayler Guest Star Andre Blake Donald Kraft Guest Star Beth Leavel Ellen Baker Guest Star Noah Hawley Executive Producer Robert DeLaurentiis Executive Producer Peter O'Fallon Executive Producer Danny Zuker Writer Ed Bianchi Director